A convenient fluid for this patient would be D5 NS + 40 mEq/L KCl or potassium
acetate to run at 75 mL/hr for the first 8 hours and D5 ½ NS and 40 mEq/L
KCl or potassium acetate at 50 mL/hr over the next 16 hours.

An appropriate initial fluid for this patient would be D5 ¼ NS with 30 mEq/L KCl or potassium
acetate to run at 50 mL/hr for the first 24 hours. Follow serum Na+ and adjust fluid composition and rate
based on clinical response. The second half of the free-water deficit may be
replaced subsequently over the next 24 hours, or more rapidly depending on
the rate of decline of serum Na+
(avoid decline of >15 mEq/L in 24 hours).